DETERMINATION OF INTERFACE SHEAR STRENGTH OF GEOSYNTHETICS USING CENTRIFUGE

摘要

In the present paper, a tilt table device for testing the interface shear strength in geotechnical centrifuge is presented. By combining the advantages of tilt table and centrifuge, our tests cover a wide range of stresses from 10 kPa to 100 kPa. After a detailed description of the tilt table device, the test process in a centrifuge and its evaluation procedure is presented. The softening behaviour in the post peak regime is investigated by controlling the displacement with a relaxation mechanism. The test results in centrifuge are discussed and compared with lg-tilt table tests and large box direct shear tests.